<template>
  <div class="login_container">
    <el-row>
      <el-col :span="12" :xs="0"></el-col>
      <el-col :span="12" :xs="24">
        <!-- 登录的表单 -->
        <el-form class="login_form" :model="loginForm" :rules="rules" ref="loginForms">
          <h1>Hello</h1>
          <h2>欢迎进入可视化后台</h2>
          <el-form-item prop="username">
            <el-input :prefix-icon="User" v-model="loginForm.username"></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input type="password" v-model="loginForm.password" :prefix-icon="Lock" show-password></el-input>
          </el-form-item>
          <el-form-item>
            <el-button class="login_btn" :loading="loading" type="primary" size="default" @click="login">登录</el-button>
          </el-form-item>
        </el-form>
      </el-col>
    </el-row>
  </div>
</template>

<script setup lang="ts">
import { User, Lock } from '@element-plus/icons-vue';
import { reactive, ref } from 'vue';
import useUserStore from "@/store/modules/user";
import { useRouter,useRoute } from 'vue-router';
import { ElNotification } from 'element-plus';


let loading = ref(false)
let $router = useRouter();
let $route = useRoute();
let useStore = useUserStore();
let loginForm = reactive({ username: 'admin', password: 'atguigu123' });
let loginForms = ref();

const login = async () => {
  //保证校验通过
  await loginForms.value.validate();
  //按钮加载
  loading.value = true
  try {
    await useStore.userLogin(loginForm);
    //跳转
    let flag:any = $route.query.redirect;
    $router.push({path:flag||'/'});
    ElNotification({
      type: 'success',
      title: '登录成功'
    })
    loading.value = false
  } catch (error) {
    loading.value = false
    ElNotification({
      type: 'error',
      title: (error as Error).message
    })
  }
}

//自定义校验规则
const validatorUserName = (_rule:any,value:any,callback:any)=>{
  //rule是校验规则对象，value是表单元素的文本内容,callback是回调函数
  if (value.length >= 5) {
    callback();
  } else {
    callback(new Error('账号长度至少五位'));
  }
}

const validatorPassWord = (_rule:any,value:any,callback:any)=>{
  if (value.length >= 6) {
    callback();
  } else {
    callback(new Error('密码长度至少六位'));
  }
}

const rules = {
  username: [
    {trigger:'change',validator:validatorUserName}
    // { required: true, message: '账号不可为空', trigger: 'blur' },
    // { required: true, min: 5, max: 10, message: '账号长度为6~10位', trigger: 'change' }
  ],
  password: [
    {trigger:'change',validator:validatorPassWord}
    // { required: true, message: '密码不可为空', trigger: 'blur' }
  ]
}

</script>

<style lang="scss" scoped>
.login_container {
  width: 100%;
  height: 100vh;
  background: url('@/assets/images/background.jpg') no-repeat;
  background-size: cover;

  .login_form {
    position: relative;
    width: 80%;
    top: 30vh;
    background: url("@/assets/images/login_form.png") no-repeat;
    background-size: cover;
    padding: 40px;

    h1 {
      color: white;
      font-size: 40px;
    }

    h2 {
      font-size: 20px;
      color: white;
      margin: 20px 0px;
    }

    .login_btn {
      width: 100%;
    }
  }
}
</style>